高氨氮难降解老龄垃圾渗滤液的处理研究

发布时间：2021-04-18 17:25

　　众所周知,垃圾渗滤液污染物质浓度含量高,是一种成分复杂且难以生物降解的废水,对环境有较大的危害。由于垃圾渗滤液的成分有赖于垃圾填埋场固体废弃物的堆积年限和堆积方式,其中有机物、无机物和重金属成分的变化较大且不稳定,因此,高浓度的垃圾渗滤液是很难处理的。本课题研究的垃圾渗滤液取自中国重庆市长生桥垃圾填埋场,渗滤液中COD, BOD₅, NH₃-N平均含量分别为1650 mg/l, 5mg/l,1100mg/l。本文在查阅国内外相关文献的基础上,结合长生桥垃圾渗滤液高氨氮、低碳的特点,考虑到氨氮和碳难以同时去除,试验采用生物处理法和物化处理法去除氨氮和COD,即分别采用序批式生物膜反应器SBBR和MAP沉淀法去除渗滤液中的氨氮,考察了这两种方法的处理效果以及各自的影响因素,并对这两种方法的处理效果进行了比较;试验还采用混凝沉淀、Fenton氧化法、混凝沉淀-Fenton氧化组合法,以及Fenton氧化-混凝沉淀组合法对COD进行去除,考察了这四种方法的去除效果,并对其处理效能进行了比较;此外,试验通过用序批式间歇生物膜反应器（SBBR）处理超声波... 

【文章来源】：重庆大学重庆市 211工程院校 985工程院校 教育部直属院校

【文章页数】：134 页

【学位级别】：博士

【文章目录】：
摘要
ABSTRACT
1 Introduction
    1.1 General
    1.2 Objectives
    1.3 Research contents
2 Background of Changsheng Bridge Landfill
    2.1 Introduction
    2.2 Site Selection of Changsheng Bridge Landfill
    2.3 Landfill Liners
        2.3.1 Synthetic Liners
        2.3.2 Soil Liners
    2.4 Rainwater and Leachate Management
    2.5 Gas collection System
    2.6 Monitoring wells
    2.7 Equipments configuration
    2.8 Daily operational works in Changsheng bridge landfill
    2.9 Landfill Closure
        2.9.1 Final cover design
        2.9.2 Procedures for landfill closure
3 Literature Review
    3.1 Sanitary Landfills
    3.2 Solid Waste Decomposition in a Sanitary Landfill
        3.2.1 Decomposition Phases
    3.3 Landfill Leachate
        3.3.1 Leachate Composition
        3.3.2 Mechanisms of leachate formation
    3.4 Leachate Treatment
        3.4.1 Biological Treatment
        3.4.2 Biological Nitrogen Removal
        3.4.3 Physical / Chemical Treatment
4 Materials and Methods
    4.1 Materials
        4.1.1 Leachate
        4.1.2 Chemical Additives
    4.2 Experimental Procedures
        4.2.1 Ultrasound Method
        4.2.2 Coagulation - Flocculation procedure
        4.2.3 Fenton treatment procedure
        4.2.4 Coagulation-Flocculation and Fenton Process procedure
        4.2.5 Sequencing Batch Biofilm Reactor （SBBR） procedure
        4.2.6 MAP （Magnesium: Ammonium: Phosphate） Precipitating procedure
    4.3 Analytical methods
5 Study of Ammonia Removal for High-Nitrogen and Low-Carbon Landfill Leachate
    5.1 Specified materials and methods for SBBR reactor
    5.2 Factors affecting on ammonia removal in SBBR reactor
        5.2.1 Effect of alkalinity on ammonia removal in SBBR reactor
        5.2.2 Effect of Temperature on ammonia removal in SBBR reactor
        5.2.3 Effect of Packing Density on ammonia removal in SBBR reactor
        5.2.4 Effect of Loading Rate on ammonia removal in SBBR reactor
    5.3 Ammonia removal by Using SBBR reactor
    5.4 Ammonia removal by MAP precipitation and its influencing factors
        5.4.1 Effect of pH value on ammonia removal by MAP
        5.4.2 Effect of Molar ratio on ammonia removal by MAP
    5.5 Comparison between SBBR and MAP method for ammonia removal
    5.6 Brief summary
6 Research on COD removal for high-nitrogen and low-carbon landfill leachate
    6.1 Research of COD removal by Coagulation-Flocculation
        6.1.1 COD removal by Coagulation-Flocculation
    6.2 Research of COD removal by Fenton Oxidation
        6.2.1 Effect of pH value on COD removal by Use Fenton Oxidation
        6.2.2 Effect of Reaction Time on COD removal by Use Fenton Oxidation
        6.2.3 Effect of Fe2+ and H202 addition on COD removal by Use Fenton Oxidation
        6.2.4 Effect of Temperature on COD removal by Use Fenton Oxidation
    6.3 Combination of Coagulation-Flocculation and Fenton for COD removal
        6.3.1 Research of COD removal by combined Treatment of Coagulation Flocculation and Fenton
        6.3.2 Research of COD removal by combined Treatment of Fenton and Coagulation-Flocculation
    6.4 Comparison among different methods for COD and color removal
    6.5 Brief summary
7 Improvement of Biodegradability for High-Nitrogen and Low-Carbon Landfill Leachate by Use Ultrasonic Method
    7.1 Effect of Ultrasonic Method on Biodegradability for High-Nitrogen and Low Carbon Landfill Leachate
        7.1.1 Effect of Ultrasonic Time on the COD Removal
        7.1.2 Effect of power supply in Ultrasonic device on COD removal
        7.1.3 Effect of temperature on the COD removal
    7.2 Use SBBR Reactor of Leachate Pretreated by Ultrasonic Wave
    7.3 Brief Summary
8 Conclusions and Recommendations
    8.1 Conclusions
    8.2 Recommendations
ACKNOWLEDGMENTS
REFERENCES
RELATED PUBLICATIONS



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